1. Contest to be announced on Feb. 8th, 2013.
2. Contest closes on Feb 21ST, 2013. Submissions must be received electronically by 5 p.m. EST, February 14th, 2013.
3. Winner will be chosen by Feb 23rd, 2013.

1. Contest to be announced on Feb. 8th, 2013.
2. Contest closes on Feb 21ST, 2013. Submissions must be received electronically by 5 p.m. EST, February 14th, 2013.
3. Winner will be chosen by Feb 23rd, 2013.

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Im confused. Is the submission due the 21st or the 14th?

The 21st. It started out being the 14th, but then the extended it. Obviously they missed an edit when they extended it.